题干
（
﹣
）÷
．
| x |
| + |
| 2 |
| x |
| 2 |
| 2 |
| x |
| x |
| 1 |
| x |
| 2 |
| 4 |
| x |
| + |
| 4 |
| 4 |
| x |
| x |
答案(点此获取答案解析）
解：原式
﹣
| x |
| + |
| 2 |
| x |
| ( |
| x |
| − |
| 2 |
| ) |
